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JP7145124B2 - Power receiving device and optical fiber power supply system - Google Patents

Power receiving device and optical fiber power supply system Download PDF

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JP7145124B2
JP7145124B2 JP2019114746A JP2019114746A JP7145124B2 JP 7145124 B2 JP7145124 B2 JP 7145124B2 JP 2019114746 A JP2019114746 A JP 2019114746A JP 2019114746 A JP2019114746 A JP 2019114746A JP 7145124 B2 JP7145124 B2 JP 7145124B2
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power
conversion element
power supply
optical fiber
receiving device
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JP2021002917A (en
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秀一 玉手
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Kyocera Corp
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Kyocera Corp
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Priority to US17/612,214 priority patent/US11888535B2/en
Priority to PCT/JP2020/019968 priority patent/WO2020255612A1/en
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S10/00—PV power plants; Combinations of PV energy systems with other systems for the generation of electric power
    • H02S10/10—PV power plants; Combinations of PV energy systems with other systems for the generation of electric power including a supplementary source of electric power, e.g. hybrid diesel-PV energy systems
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/30—Circuit arrangements or systems for wireless supply or distribution of electric power using light, e.g. lasers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S10/00—PV power plants; Combinations of PV energy systems with other systems for the generation of electric power
    • H02S10/30—Thermophotovoltaic systems
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
    • H02S40/20—Optical components
    • H02S40/22—Light-reflecting or light-concentrating means
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
    • H02S40/40—Thermal components
    • H02S40/44—Means to utilise heat energy, e.g. hybrid systems producing warm water and electricity at the same time
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/80—Optical aspects relating to the use of optical transmission for specific applications, not provided for in groups H04B10/03 - H04B10/70, e.g. optical power feeding or optical transmission through water
    • H04B10/806—Arrangements for feeding power
    • H04B10/807—Optical power feeding, i.e. transmitting power using an optical signal
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0005—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being of the fibre type
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G02B6/4296—Coupling light guides with opto-electronic elements coupling with sources of high radiant energy, e.g. high power lasers, high temperature light sources
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/32—Means for protecting converters other than automatic disconnection
    • H02M1/327—Means for protecting converters other than automatic disconnection against abnormal temperatures
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N10/00—Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/52—PV systems with concentrators
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/60—Thermal-PV hybrids

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Electromagnetism (AREA)
  • Signal Processing (AREA)
  • Optics & Photonics (AREA)
  • Power Engineering (AREA)
  • Optical Communication System (AREA)
  • Optical Couplings Of Light Guides (AREA)
  • Photovoltaic Devices (AREA)

Description

本開示は、受電装置及び光ファイバー給電システムに関する。 TECHNICAL FIELD The present disclosure relates to power receiving devices and fiber optic power feeding systems.

近時、電力を光（給電光と呼ばれる）に変換して伝送し、当該給電光を電気エネルギーに変換して電力として利用する光給電システムが研究されている。特許文献１には、電気信号で変調された信号光、及び電力を供給するための給電光を発信する光発信機と、上記信号光を伝送するコア、上記コアの周囲に形成され上記コアより屈折率が小さく上記給電光を伝送する第１クラッド、及び上記第１クラッドの周囲に形成され上記第１クラッドより屈折率が小さい第２クラッド、を有する光ファイバーと、上記光ファイバーの第１クラッドで伝送された上記給電光を変換した電力で動作し、上記光ファイバーのコアで伝送された上記信号光を上記電気信号に変換する光受信機と、を備えた光通信装置が記載されている。 In recent years, research has been conducted on an optical power supply system that converts power into light (called power supply light) for transmission, converts the power supply light into electrical energy, and uses the power as power. Patent Document 1 discloses an optical transmitter that emits signal light modulated by an electric signal and feeding light for supplying power, a core that transmits the signal light, and a core that is formed around the core and from the core. an optical fiber having a first clad having a small refractive index for transmitting the feeding light, and a second clad formed around the first clad and having a smaller refractive index than the first clad; and transmission through the first clad of the optical fiber. and an optical receiver that operates on electric power obtained by converting the supplied feeding light and converts the signal light transmitted through the core of the optical fiber into the electrical signal.

特開２０１０－１３５９８９号公報JP 2010-135989 A

光給電においては、光電変換素子の電力変換ロスにより、光電変換素子が発熱する。また、光給電においては、負荷の増減に応じて、給電光の強度を増減することが難しく、余剰の給電光が入力された場合、余剰の給電光が光電変換素子で熱に変換され、エネルギーの損失となる。 In optical power supply, the photoelectric conversion element generates heat due to power conversion loss of the photoelectric conversion element. In addition, in optical power supply, it is difficult to increase or decrease the intensity of the power supply light according to the increase or decrease of the load. loss.

本開示は、エネルギー損失を低減できる受電装置及び光ファイバー給電システムを提供することを目的とする。 An object of the present disclosure is to provide a power receiving device and an optical fiber power supply system capable of reducing energy loss.

本開示の受電装置は、
給電光を受けて電力に変換する光電変換素子と、
前記光電変換素子から熱伝導可能に配置された熱電変換素子と、
前記熱電変換素子により変換された電力を負荷へ送る第１電力線と、
前記光電変換素子の異常発熱に基づいて該異常発熱に対処する異常対処部と、
を備え、
前記熱電変換素子から前記異常対処部へ電力が送られる。 The power receiving device of the present disclosure includes:
a photoelectric conversion element that receives the supplied light and converts it into electric power;
a thermoelectric conversion element arranged so that heat can be conducted from the photoelectric conversion element;
a first power line for transmitting power converted by the thermoelectric conversion element to a load;
an anomaly handling unit that copes with abnormal heat generation based on the abnormal heat generation of the photoelectric conversion element;
with
Electric power is sent from the thermoelectric conversion element to the abnormality handling unit .

本開示の光ファイバー給電システムは、
光ファイバーを介して給電光を送る給電装置と、
前記光ファイバーを介して給電光を受ける上記の受電装置と、
を備える。 The fiber optic feeding system of the present disclosure includes:
a power supply device that transmits power supply light via an optical fiber;
the power receiving device that receives power supply light via the optical fiber;
Prepare.

本開示によれば、エネルギー損失を低減できる受電装置及び光ファイバー給電システムを提供することができる。 According to the present disclosure, it is possible to provide a power receiving device and an optical fiber power supply system capable of reducing energy loss.

本開示の第１実施形態に係る光ファイバー給電システムの構成図である。1 is a configuration diagram of an optical fiber feeding system according to a first embodiment of the present disclosure; FIG. 本開示の第２実施形態に係る光ファイバー給電システムの構成図である。FIG. 2 is a configuration diagram of an optical fiber power supply system according to a second embodiment of the present disclosure; FIG. 本開示の第２実施形態に係る光ファイバー給電システムの構成図であって、光コネクタ等を図示したものある。FIG. 10 is a configuration diagram of an optical fiber feeding system according to a second embodiment of the present disclosure, including an optical connector and the like; 本開示の他の一実施形態に係る光ファイバー給電システムの構成図である。FIG. 4 is a configuration diagram of an optical fiber feeding system according to another embodiment of the present disclosure; 本開示の第３実施形態に係る受電装置を示す構成図である。FIG. 11 is a configuration diagram showing a power receiving device according to a third embodiment of the present disclosure; 本開示の第４実施形態に係る受電装置を示す構成図である。FIG. 11 is a configuration diagram showing a power receiving device according to a fourth embodiment of the present disclosure;

以下に本開示の一実施形態につき図面を参照して説明する。 An embodiment of the present disclosure will be described below with reference to the drawings.

（１）システム概要
〔第１実施形態〕
図１に示すように本実施形態の光ファイバー給電（PoF：Power over Fiber）システム１Ａは、給電装置（PSE：Power Sourcing Equipment）１１０と、光ファイバーケーブル２００Ａと、受電装置（PD：Powered Device）３１０を備える。
なお、本開示における給電装置は電力を光エネルギーに変換して供給する装置であり、受電装置は光エネルギーの供給を受け当該光エネルギーを電力に変換する装置である。
給電装置１１０は、給電用半導体レーザー１１１を含む。
光ファイバーケーブル２００Ａは、給電光の伝送路を形成する光ファイバー２５０Ａを含む。
受電装置３１０は、光電変換素子３１１を含む。 (1) System Overview [First Embodiment]
As shown in FIG. 1, an optical fiber power supply (PoF: Power over Fiber) system 1A of this embodiment includes a power supply device (PSE: Power Sourcing Equipment) 110, an optical fiber cable 200A, and a power receiving device (PD: Powered Device) 310. Prepare.
Note that a power supply device in the present disclosure is a device that converts electric power into optical energy and supplies it, and a power receiving device is a device that receives supply of optical energy and converts the optical energy into electric power.
The power supply device 110 includes a power supply semiconductor laser 111 .
The optical fiber cable 200A includes an optical fiber 250A that forms a transmission line for feeding light.
A power receiving device 310 includes a photoelectric conversion element 311 .

給電装置１１０は電源に接続され、給電用半導体レーザー１１１等が電気駆動される。
給電用半導体レーザー１１１は、上記電源からの電力によりレーザー発振して給電光１１２を出力する。 The power supply device 110 is connected to a power supply, and the power supply semiconductor laser 111 and the like are electrically driven.
The power supply semiconductor laser 111 oscillates with power from the power supply and outputs power supply light 112 .

光ファイバーケーブル２００Ａは、一端２０１Ａが給電装置１１０に接続可能とされ、他端２０２Ａが受電装置３１０に接続可能とされ、給電光１１２を伝送する。
給電装置１１０からの給電光１１２が、光ファイバーケーブル２００Ａの一端２０１Ａに入力され、給電光１１２は光ファイバー２５０Ａ中を伝搬し、他端２０２Ａから受電装置３１０に出力される。 The optical fiber cable 200A has one end 201A connectable to the power supply device 110 and the other end 202A connectable to the power receiving device 310 to transmit the power supply light 112 .
Feeding light 112 from feeding device 110 is input to one end 201A of optical fiber cable 200A, propagates through optical fiber 250A, and is output to power receiving device 310 from other end 202A.

光電変換素子３１１は、光ファイバーケーブル２００Ａを通して伝送されてきた給電光１１２を電力に変換する。光電変換素子３１１により変換された電力が、受電装置３１０内で必要な駆動電力とされる。さらに受電装置３１０は光電変換素子３１１により変換された電力を外部機器用に出力可能とされる。 The photoelectric conversion element 311 converts the feeding light 112 transmitted through the optical fiber cable 200A into electric power. The power converted by the photoelectric conversion element 311 is used as driving power required in the power receiving device 310 . Further, the power receiving device 310 can output the power converted by the photoelectric conversion element 311 to an external device.

給電用半導体レーザー１１１及び光電変換素子３１１の光‐電気間の変換効果を奏する半導体領域を構成する半導体材料が５００ｎｍ以下の短波長のレーザー波長をもった半導体とされる。
短波長のレーザー波長をもった半導体は、バンドギャップが大きく光電変換効率が高いので、光給電の発電側及び受電側における光電変換効率が向上され、光給電効率が向上する。
そのためには、同半導体材料として、例えば、ダイヤモンド、酸化ガリウム、窒化アルミニウム、ＧａＮ等、レーザー波長（基本波）が２００～５００ｎｍのレーザー媒体の半導体材料を用いてもよい。
また、同半導体材料として、２．４ｅＶ以上のバンドギャップを有した半導体が適用される。
例えば、ダイヤモンド、酸化ガリウム、窒化アルミニウム、ＧａＮ等、バンドギャップ２．４～６．２ｅＶのレーザー媒体の半導体材料を用いてもよい。
なお、レーザー光は長波長ほど伝送効率が良く、短波長ほど光電変換効率が良い傾向にある。したがって、長距離伝送の場合には、レーザー波長（基本波）が５００ｎｍより大きいレーザー媒体の半導体材料を用いてもよい。また、光電変換効率を優先する場合には、レーザー波長（基本波）が２００ｎｍより小さいレーザー媒体の半導体材料を用いてもよい。
これらの半導体材料は、給電用半導体レーザー１１１及び光電変換素子３１１のいずれか一方に適用してもよい。給電側又は受電側における光電変換効率が向上され、光給電効率が向上する。 The semiconductor material constituting the semiconductor region that produces the light-electricity conversion effect of the power supply semiconductor laser 111 and the photoelectric conversion element 311 is a semiconductor having a short laser wavelength of 500 nm or less.
A semiconductor having a short laser wavelength has a large bandgap and high photoelectric conversion efficiency, so that the photoelectric conversion efficiency is improved on the power generation side and the power receiving side of optical power supply, and the optical power supply efficiency is improved.
For this purpose, a semiconductor material of a laser medium having a laser wavelength (fundamental wave) of 200 to 500 nm, such as diamond, gallium oxide, aluminum nitride, or GaN, may be used as the semiconductor material.
As the semiconductor material, a semiconductor having a bandgap of 2.4 eV or more is applied.
For example, a laser medium semiconductor material with a bandgap of 2.4 to 6.2 eV, such as diamond, gallium oxide, aluminum nitride, or GaN, may be used.
Note that the longer the wavelength of the laser light, the better the transmission efficiency, and the shorter the wavelength, the better the photoelectric conversion efficiency. Therefore, in the case of long-distance transmission, a laser medium semiconductor material with a laser wavelength (fundamental wave) of greater than 500 nm may be used. Moreover, when the photoelectric conversion efficiency is prioritized, a semiconductor material for a laser medium having a laser wavelength (fundamental wave) of less than 200 nm may be used.
These semiconductor materials may be applied to either the power supply semiconductor laser 111 or the photoelectric conversion element 311 . The photoelectric conversion efficiency is improved on the power feeding side or the power receiving side, and the optical power feeding efficiency is improved.

〔第２実施形態〕
図２に示すように本実施形態の光ファイバー給電（PoF：Power over Fiber）システム１は、光ファイバーを介した給電システムと光通信システムとを含むものであり、給電装置（PSE：Power Sourcing Equipment）１１０を含む第１のデータ通信装置１００と、光ファイバーケーブル２００と、受電装置（PD：Powered Device）３１０を含む第２のデータ通信装置３００とを備える。
給電装置１１０は、給電用半導体レーザー１１１を含む。第１のデータ通信装置１００は、給電装置１１０のほか、データ通信を行う発信部１２０と、受信部１３０とを含む。第１のデータ通信装置１００は、データ端末装置（DTEP：Date Terminal Equipment）、中継器（Repeater）等に相当する。発信部１２０は、信号用半導体レーザー１２１と、モジュレーター１２２とを含む。受信部１３０は、信号用フォトダイオード１３１を含む。 [Second embodiment]
As shown in FIG. 2, the optical fiber power supply (PoF: Power over Fiber) system 1 of the present embodiment includes a power supply system via optical fibers and an optical communication system, and a power supply device (PSE: Power Sourcing Equipment) 110 , an optical fiber cable 200 , and a second data communication device 300 including a power receiving device (PD) 310 .
The power supply device 110 includes a power supply semiconductor laser 111 . The first data communication device 100 includes a power supply device 110, a transmission unit 120 that performs data communication, and a reception unit . The first data communication device 100 corresponds to a data terminal device (DTEP: Date Terminal Equipment), a repeater, or the like. The transmitter 120 includes a signal semiconductor laser 121 and a modulator 122 . The receiver 130 includes a signal photodiode 131 .

光ファイバーケーブル２００は、信号光の伝送路を形成するコア２１０と、コア２１０の外周に配置され、給電光の伝送路を形成するクラッド２２０と有する光ファイバー２５０を含む。 The optical fiber cable 200 includes an optical fiber 250 having a core 210 forming a signal light transmission line, a clad 220 disposed around the core 210 and forming a power supply light transmission line.

受電装置３１０は、光電変換素子３１１を含む。第２のデータ通信装置３００は、受電装置３１０のほか、発信部３２０と、受信部３３０と、データ処理ユニット３４０とを含む。第２のデータ通信装置３００は、パワーエンドステーション（Power End Station）等に相当する。発信部３２０は、信号用半導体レーザー３２１と、モジュレーター３２２とを含む。受信部３３０は、信号用フォトダイオード３３１を含む。データ処理ユニット３４０は、受信した信号を処理するユニットである。また、第２のデータ通信装置３００は、通信ネットワークにおけるノードである。または第２のデータ通信装置３００は、他のノードと通信するノードでもよい。 A power receiving device 310 includes a photoelectric conversion element 311 . Second data communication device 300 includes power receiving device 310 as well as transmitting section 320 , receiving section 330 and data processing unit 340 . The second data communication device 300 corresponds to a power end station or the like. The transmitter 320 includes a signal semiconductor laser 321 and a modulator 322 . The receiver 330 includes a signal photodiode 331 . The data processing unit 340 is a unit that processes the received signal. Also, the second data communication device 300 is a node in the communication network. Alternatively, the second data communication device 300 may be a node that communicates with other nodes.

第１のデータ通信装置１００は電源に接続され、給電用半導体レーザー１１１、信号用半導体レーザー１２１と、モジュレーター１２２、信号用フォトダイオード１３１等が電気駆動される。また、第１のデータ通信装置１００は、通信ネットワークにおけるノードである。または第１のデータ通信装置１００は、他のノードと通信するノードでもよい。
給電用半導体レーザー１１１は、上記電源からの電力によりレーザー発振して給電光１１２を出力する。 The first data communication device 100 is connected to a power source, and the power supply semiconductor laser 111, signal semiconductor laser 121, modulator 122, signal photodiode 131, etc. are electrically driven. Also, the first data communication device 100 is a node in the communication network. Alternatively, the first data communication device 100 may be a node that communicates with other nodes.
The power supply semiconductor laser 111 oscillates with power from the power supply and outputs power supply light 112 .

光電変換素子３１１は、光ファイバーケーブル２００を通して伝送されてきた給電光１１２を電力に変換する。光電変換素子３１１により変換された電力は、発信部３２０、受信部３３０及びデータ処理ユニット３４０の駆動電力、その他の第２のデータ通信装置３００内で必要となる駆動電力とされる。さらに第２のデータ通信装置３００は、光電変換素子３１１により変換された電力を外部機器用に出力可能とされていてもよい。 The photoelectric conversion element 311 converts the feeding light 112 transmitted through the optical fiber cable 200 into electric power. The power converted by the photoelectric conversion element 311 is used as driving power for the transmitting section 320 , the receiving section 330 and the data processing unit 340 , and other driving power required in the second data communication device 300 . Furthermore, the second data communication device 300 may be capable of outputting the power converted by the photoelectric conversion element 311 for external equipment.

一方、発信部１２０のモジュレーター１２２は、信号用半導体レーザー１２１からのレーザー光１２３を送信データ１２４に基づき変調して信号光１２５として出力する。
受信部３３０の信号用フォトダイオード３３１は、光ファイバーケーブル２００を通して伝送されてきた信号光１２５を電気信号に復調し、データ処理ユニット３４０に出力する。データ処理ユニット３４０は、当該電気信号によるデータをノードに送信し、その一方で当該ノードからデータを受信し、送信データ３２４としてモジュレーター３２２に出力する。
発信部３２０のモジュレーター３２２は、信号用半導体レーザー３２１からのレーザー光３２３を送信データ３２４に基づき変調して信号光３２５として出力する。
受信部１３０の信号用フォトダイオード１３１は、光ファイバーケーブル２００を通して伝送されてきた信号光３２５を電気信号に復調し出力する。当該電気信号によるデータがノードに送信され、その一方で当該ノードからのデータが送信データ１２４とされる。 On the other hand, the modulator 122 of the transmission unit 120 modulates the laser light 123 from the signal semiconductor laser 121 based on the transmission data 124 and outputs it as the signal light 125 .
The signal photodiode 331 of the receiver 330 demodulates the signal light 125 transmitted through the optical fiber cable 200 into an electrical signal and outputs the electrical signal to the data processing unit 340 . The data processing unit 340 transmits data in the electrical signal to the node, while receiving data from the node and outputting it as transmitted data 324 to the modulator 322 .
A modulator 322 of a transmission section 320 modulates a laser beam 323 from a signal semiconductor laser 321 based on transmission data 324 and outputs it as a signal beam 325 .
The signal photodiode 131 of the receiver 130 demodulates the signal light 325 transmitted through the optical fiber cable 200 into an electrical signal and outputs the electrical signal. Data in the electrical signal is transmitted to the node, while data from the node is transmitted data 124 .

第１のデータ通信装置１００からの給電光１１２及び信号光１２５が、光ファイバーケーブル２００の一端２０１に入力され、給電光１１２はクラッド２２０を伝搬し、信号光１２５はコア２１０を伝搬し、他端２０２から第２のデータ通信装置３００に出力される。
第２のデータ通信装置３００からの信号光３２５が、光ファイバーケーブル２００の他端２０２に入力され、コア２１０を伝搬し、一端２０１から第１のデータ通信装置１００に出力される。 Feeding light 112 and signal light 125 from the first data communication device 100 are input to one end 201 of the optical fiber cable 200, the feeding light 112 propagates through the clad 220, the signal light 125 propagates through the core 210, and the other end 202 to the second data communication device 300 .
Signal light 325 from second data communication device 300 is input to other end 202 of optical fiber cable 200 , propagates through core 210 , and is output from one end 201 to first data communication device 100 .

なお、図３に示すように第１のデータ通信装置１００に光入出力部１４０とこれに付設された光コネクタ１４１が設けられる。また、第２のデータ通信装置３００に光入出力部３５０とこれに付設された光コネクタ３５１が設けられる。光ファイバーケーブル２００の一端２０１に設けられた光コネクタ２３０が光コネクタ１４１に接続する。光ファイバーケーブル２００の他端２０２に設けられた光コネクタ２４０が光コネクタ３５１に接続する。光入出力部１４０は、給電光１１２をクラッド２２０に導光し、信号光１２５をコア２１０に導光し、信号光３２５を受信部１３０に導光する。光入出力部３５０は、給電光１１２を受電装置３１０に導光し、信号光１２５を受信部３３０に導光し、信号光３２５をコア２１０に導光する。
以上のように、光ファイバーケーブル２００は、一端２０１が第１のデータ通信装置１００に接続可能とされ、他端２０２が第２のデータ通信装置３００に接続可能とされ、給電光１１２を伝送する。さらに本実施形態では、光ファイバーケーブル２００は、信号光１２５，３２５を双方向伝送する。 As shown in FIG. 3, the first data communication device 100 is provided with an optical input/output unit 140 and an optical connector 141 attached thereto. Also, the second data communication device 300 is provided with an optical input/output unit 350 and an optical connector 351 attached thereto. An optical connector 230 provided at one end 201 of the optical fiber cable 200 connects to the optical connector 141 . An optical connector 240 provided at the other end 202 of the optical fiber cable 200 connects to the optical connector 351 . The optical input/output unit 140 guides the feeding light 112 to the clad 220 , guides the signal light 125 to the core 210 , and guides the signal light 325 to the receiving unit 130 . The optical input/output unit 350 guides the feeding light 112 to the power receiving device 310 , guides the signal light 125 to the receiving unit 330 , and guides the signal light 325 to the core 210 .
As described above, the optical fiber cable 200 has one end 201 connectable to the first data communication device 100 and the other end 202 connectable to the second data communication device 300 to transmit the power supply light 112 . Furthermore, in this embodiment, the optical fiber cable 200 bidirectionally transmits the signal lights 125 and 325 .

給電用半導体レーザー１１１及び光電変換素子３１１の光‐電気間の変換効果を奏する半導体領域を構成する半導体材料としては上記第１実施形態と同様のものが適用され、高い光給電効率が実現される。 The same semiconductor material as in the first embodiment is applied as the semiconductor material constituting the semiconductor region that produces the light-electricity conversion effect of the power supply semiconductor laser 111 and the photoelectric conversion element 311, and high light power supply efficiency is realized. .

なお、図４に示す光ファイバー給電システム１Ｂの光ファイバーケーブル２００Ｂように、信号光を伝送する光ファイバー２６０と、給電光を伝送する光ファイバー２７０とを別々に設けてもよい。光ファイバーケーブル２００Ｂも複数本で構成してもよい。 As in the optical fiber cable 200B of the optical fiber feeding system 1B shown in FIG. 4, the optical fiber 260 for transmitting the signal light and the optical fiber 270 for transmitting the feeding light may be provided separately. A plurality of optical fiber cables 200B may also be used.

（２）受電装置の損失低減手段
次に、受電装置の損失低減手段について説明する。
〔第３実施形態〕
図５は、損失低減手段が適用された第３実施形態の受電装置を示す構成図である。図５中、上述したものと同一の構成要素については同一符号を付して詳細な説明を省略する。 (2) Loss Reduction Means of Power Receiving Device Next, loss reduction means of the power receiving device will be described.
[Third Embodiment]
FIG. 5 is a configuration diagram showing a power receiving device according to a third embodiment to which loss reducing means is applied. In FIG. 5, the same components as those described above are denoted by the same reference numerals, and detailed description thereof will be omitted.

第３実施形態の受電装置３１０Ｃは、給電光１１２を受けて電力に変換する光電変換素子３１１と、光電変換素子３１１から熱伝導可能に配置された熱電変換素子３１４と、光電変換素子３１１から負荷３９０へ電力を伝送する電力線３１２と、熱電変換素子３１４から負荷３９０へ電力を伝送する電力線３１５と、電力線３１２、３１５上に介在された電流逆流防止回路３１９とを備える。光電変換素子３１１の受光側にはレンズ３１３が配置されていてもよい。 The power receiving device 310C of the third embodiment includes a photoelectric conversion element 311 that receives the power supply light 112 and converts it into electric power, a thermoelectric conversion element 314 that is arranged so that heat can be conducted from the photoelectric conversion element 311, and a load from the photoelectric conversion element 311. A power line 312 for transmitting power to 390 , a power line 315 for transmitting power from the thermoelectric conversion element 314 to the load 390 , and a current backflow prevention circuit 319 interposed on the power lines 312 and 315 . A lens 313 may be arranged on the light receiving side of the photoelectric conversion element 311 .

負荷３９０は、例えば、データ処理ユニット３４０、その他の機能モジュール、外部機器、又は、これらのいずれか複数であってもよい。 Load 390 may be, for example, data processing unit 340, other functional modules, external equipment, or any or more of these.

電流逆流防止回路３１９は、例えば各電力線３１２、３１５上に配置された逆流防止ダイオードＤ１、Ｄ２を含み、光電変換素子３１１から熱電変換素子３１４並びにその逆に電流が流れることを防止する。 The current backflow prevention circuit 319 includes, for example, backflow prevention diodes D1 and D2 arranged on the respective power lines 312 and 315 to prevent current from flowing from the photoelectric conversion element 311 to the thermoelectric conversion element 314 and vice versa.

熱電変換素子３１４は、例えばゼーベック効果により光電変換素子３１１の熱を一方に受けて電圧を発生する。光電変換素子３１１の発熱量が増し、熱電変換素子３１４の熱勾配が一定以上になると、熱電変換素子３１４の出力電圧が高まる。そして、熱電変換素子３１４の出力電圧が所定電圧を超えると、逆流防止ダイオードＤ２に電流が流れて、熱電変換素子３１４から負荷３９０へ電力が出力される。なお、熱電変換素子３１４の小さい出力電圧から高い電圧を生成し、負荷３９０へ送る昇圧回路が、電力線３１５上に介在されてもよい。 The thermoelectric conversion element 314 receives heat from the photoelectric conversion element 311 on one side due to the Seebeck effect, for example, and generates a voltage. When the amount of heat generated by the photoelectric conversion element 311 increases and the thermal gradient of the thermoelectric conversion element 314 exceeds a certain level, the output voltage of the thermoelectric conversion element 314 increases. Then, when the output voltage of the thermoelectric conversion element 314 exceeds a predetermined voltage, current flows through the anti-backflow diode D2 and electric power is output from the thermoelectric conversion element 314 to the load 390 . A booster circuit that generates a high voltage from the low output voltage of the thermoelectric conversion element 314 and sends it to the load 390 may be interposed on the power line 315 .

以上のように、第３実施形態の受電装置３１０Ｃによれば、給電光１１２を受けて、発熱した光電変換素子３１１の熱が、熱電変換素子３１４で電力に変換され、負荷３９０に供給される。したがって、受電装置３１０Ｃのエネルギー損失を低減できる。
さらに、負荷変動又は給電光１１２の光量に変動が生じ、給電光１１２に余剰分が生じたり不足分が生じたりする場合を想定する。このような場合、熱電変換素子３１４の電力変換により、余剰な給電光１１２により生じた熱は、時間をずらして熱電変換素子３１４で電力に変換される。そして、このように変換された電力が、給電光１１２に不足分が生じたタイミングで負荷３９０へ供給できる。したがって、第３実施形態の受電装置３１０Ｃによれば、給電光１１２の余剰分と不足分とを均一化する作用を得ることができる。 As described above, according to the power receiving device 310</b>C of the third embodiment, the heat of the photoelectric conversion element 311 that is generated by receiving the power supply light 112 is converted into power by the thermoelectric conversion element 314 and supplied to the load 390 . . Therefore, the energy loss of the power receiving device 310C can be reduced.
Furthermore, it is assumed that the load changes or the light amount of the power supply light 112 changes, and the power supply light 112 has a surplus or a shortage. In such a case, due to the power conversion of the thermoelectric conversion element 314, the heat generated by the excess power supply light 112 is converted into electric power by the thermoelectric conversion element 314 with a time delay. Then, the power converted in this manner can be supplied to the load 390 at the timing when the power supply light 112 becomes insufficient. Therefore, according to the power receiving device 310</b>C of the third embodiment, it is possible to obtain the effect of equalizing the surplus and the shortage of the feeding light 112 .

第３実施形態の受電装置３１０Ｃは、図１、図２、図４の受電装置３１０と置き換えることで、図１、図２、図４の光ファイバー給電システム１Ａ、１、１Ｂに適用することができる。 The power receiving device 310C of the third embodiment can be applied to the optical fiber power supply systems 1A, 1, and 1B of FIGS. 1, 2, and 4 by replacing the power receiving device 310 of FIGS. .

〔第４実施形態〕
図６は、損失低減手段が適用された第４実施形態の受電装置を示す構成図である。図６中、上述したものと同一の構成要素については同一符号を付して詳細な説明を省略する。 [Fourth embodiment]
FIG. 6 is a configuration diagram showing a power receiving device according to a fourth embodiment to which loss reducing means is applied. In FIG. 6, the same components as those described above are denoted by the same reference numerals, and detailed description thereof will be omitted.

第４実施形態の受電装置３１０Ｄは、第３実施形態の構成に加えて、例えば光電変換素子３１１が高温になるなどの異常が生じた場合に、この異常の対処を行う異常対処部３１７を備える。異常対処部３１７は、負荷の一部である。さらに、第４実施形態においては、電力線３１５が異常対処部３１７に接続され、熱電変換素子３１４から異常対処部３１７へ電力が送られる。 The power receiving device 310D of the fourth embodiment includes, in addition to the configuration of the third embodiment, an abnormality handling unit 317 that handles an abnormality such as the photoelectric conversion element 311 becoming hot. . The anomaly handling unit 317 is part of the load. Furthermore, in the fourth embodiment, the power line 315 is connected to the abnormality handling section 317 and electric power is sent from the thermoelectric conversion element 314 to the abnormality handling section 317 .

異常対処部３１７は、例えば、冷却ファンであり、異常発熱した光電変換素子３１１並びにその周辺構成を冷却する。あるいは、異常対処部３１７は、例えば光電変換素子３１１の異常発熱に基づき、給電光１１２の出力を停止するよう、給電装置１１０へ要求信号を出力する通信装置であってもよい。通信装置は、メタル回線、無線又は光ファイバーを介して信号を出力する構成であってもよい。あるいは、異常対処部３１７は、受電装置３１０Ｄの受光部が異常発熱したときに、発熱箇所を映像信号として出力する撮影装置であってもよい。 The abnormality handling unit 317 is, for example, a cooling fan, and cools the abnormally heated photoelectric conversion element 311 and its peripheral components. Alternatively, the abnormality handling unit 317 may be a communication device that outputs a request signal to the power supply device 110 to stop the output of the power supply light 112 based on, for example, abnormal heat generation of the photoelectric conversion element 311 . The communication device may be configured to output signals via a metal line, radio or optical fiber. Alternatively, the abnormality handling unit 317 may be a photographing device that outputs a video signal showing the location of heat generation when the light receiving unit of the power receiving device 310D abnormally heats up.

このような構成によれば、光電変換素子３１１が異常発熱した場合、この熱を利用して、例えば冷却ファンにより発熱箇所を冷却したり、給電光１１２の出力を停止させたり、発熱箇所を映像出力するなどの、異常に対処する処理を実行できる。 According to such a configuration, when the photoelectric conversion element 311 abnormally heats up, the heat is used to cool the heat-generating portion with, for example, a cooling fan, stop the output of the power supply light 112, or display the heat-generating portion in an image. Abnormal processing such as output can be executed.

仮に、光電変換素子３１１が故障する一方、給電光１１２の入力が継続されたとする。このような場合、故障により光電変換素子３１１からの電力供給が減少又は停止する一方、給電光１１２の入力が続いて光電変換素子３１１が異常発熱する。このような場合、光電変換素子３１１の出力電力だけで、異常対処部３１７を駆動しようとすると、電力低下により、異常対処部３１７を正常に駆動できない恐れがある。しかしながら、第４実施形態の受電装置３１０Ｄでは、このような場合でも、熱電変換素子３１４からの電力で、異常対処部３１７を駆動し、異常に対処することができる。 Assume that the input of the power supply light 112 continues while the photoelectric conversion element 311 fails. In such a case, the power supply from the photoelectric conversion element 311 is reduced or stopped due to the failure, while the power supply light 112 continues to be input, causing the photoelectric conversion element 311 to generate abnormal heat. In such a case, if an attempt is made to drive the abnormality handling section 317 only with the output power of the photoelectric conversion element 311, the abnormality handling section 317 may not be able to be driven normally due to the power drop. However, in the power receiving device 310D of the fourth embodiment, even in such a case, the power from the thermoelectric conversion element 314 can be used to drive the anomaly handling unit 317 to deal with the anomaly.

なお、第４実施形態の受電装置３１０Ｄでは、熱電変換素子３１４の電力線３１５を、光電変換素子３１１の電力線３１２と合流せずに、異常対処部３１７へ接続した例を示した。しかし、第４実施形態においても、第３実施形態の受電装置３１０Ｃと同様に、電力線３１２、３１５が互いに合流され、合流された電力線を介して電力が異常対処部３１７へ供給される構成としてもよい。 In the power receiving device 310D of the fourth embodiment, the power line 315 of the thermoelectric conversion element 314 is connected to the abnormality handling unit 317 without joining the power line 312 of the photoelectric conversion element 311 . However, even in the fourth embodiment, similarly to the power receiving device 310C of the third embodiment, the power lines 312 and 315 may be joined together, and power may be supplied to the abnormality handling unit 317 via the joined power line. good.

第４実施形態の受電装置３１０Ｄは、図１、図２、図４の受電装置３１０と置き換えることで、図１、図２、図４の光ファイバー給電システム１Ａ、１、１Ｂに適用することができる。 The power receiving device 310D of the fourth embodiment can be applied to the optical fiber feeding systems 1A, 1 and 1B of FIGS. 1, 2 and 4 by replacing the power receiving device 310 of FIGS. .

以上本開示の実施形態を説明したが、この実施形態は、例として示したものであり、この他の様々な形態で実施が可能であり、発明の要旨を逸脱しない範囲で、構成要素の省略、置き換え、変更を行うことができる。 Although the embodiment of the present disclosure has been described above, this embodiment is shown as an example, and can be implemented in various other forms. , can be replaced and changed.

１Ａ 光ファイバー給電システム
１ 光ファイバー給電システム
１Ｂ 光ファイバー給電システム
１００ 第１のデータ通信装置
１１０ 給電装置
１１１ 給電用半導体レーザー
１１２ 給電光
１２０ 発信部
１２５ 信号光
１３０ 受信部
１４０ 光入出力部
１４１ 光コネクタ
２００Ａ 光ファイバーケーブル
２００ 光ファイバーケーブル
２００Ｂ 光ファイバーケーブル
２１０ コア
２２０ クラッド
２５０Ａ 光ファイバー
２５０ 光ファイバー
２６０ 光ファイバー
２７０ 光ファイバー
３００ 第２のデータ通信装置
３１０ 受電装置
３１０Ｃ 受電装置
３１０Ｄ 受電装置
３１１ 光電変換素子
３１２ 電力線（第２電力線）
３１４ 熱電変換素子
３１５ 電力線（第１電力線）
３１７ 異常対処部
３１９ 電流逆流防止回路
Ｄ１、Ｄ２ 逆流防止ダイオード
３２０ 発信部
３２５ 信号光
３３０ 受信部
３５０ 光入出力部
３５１ 光コネクタ
３９０ 負荷 1A Optical fiber power supply system 1 Optical fiber power supply system 1B Optical fiber power supply system 100 First data communication device 110 Power supply device 111 Power supply semiconductor laser 112 Power supply light 120 Transmitting unit 125 Signal light 130 Receiving unit 140 Optical input/output unit 141 Optical connector 200A Optical fiber cable 200 optical fiber cable 200B optical fiber cable 210 core 220 clad 250A optical fiber 250 optical fiber 260 optical fiber 270 optical fiber 300 second data communication device 310 power receiving device 310C power receiving device 310D power receiving device 311 photoelectric conversion element 312 power line (second power line)
314 thermoelectric conversion element 315 power line (first power line)
317 Abnormality handling unit 319 Backflow prevention circuits D1, D2 Backflow prevention diode 320 Transmission unit 325 Signal light 330 Reception unit 350 Optical input/output unit 351 Optical connector 390 Load

Claims (3)

給電光を受けて電力に変換する光電変換素子と、
前記光電変換素子から熱伝導可能に配置された熱電変換素子と、
前記熱電変換素子により変換された電力を負荷へ送る第１電力線と、
前記光電変換素子の異常発熱に基づいて該異常発熱に対処する異常対処部と、
を備え、
前記熱電変換素子から前記異常対処部へ電力が送られる受電装置。 a photoelectric conversion element that receives the supplied light and converts it into electric power;
a thermoelectric conversion element arranged so that heat can be conducted from the photoelectric conversion element;
a first power line for transmitting power converted by the thermoelectric conversion element to a load;
an anomaly handling unit that copes with abnormal heat generation based on the abnormal heat generation of the photoelectric conversion element;
with
A power receiving device in which power is sent from the thermoelectric conversion element to the abnormality handling unit . 前記第１電力線が、前記光電変換素子が変換した電力を負荷へ送る第２電力線と逆流防止回路を介して接続されている、
請求項１記載の受電装置。 The first power line is connected via a backflow prevention circuit to a second power line that transmits the power converted by the photoelectric conversion element to a load,
The power receiving device according to claim 1 . 光ファイバーを介して給電光を送る給電装置と、
前記光ファイバーを介して給電光を受ける請求項１又は請求項２に記載の受電装置と、
を備える光ファイバー給電システム。 a power supply device that transmits power supply light via an optical fiber;
3. The power receiving device according to claim 1 , which receives power supply light via the optical fiber;
An optical fiber feeding system with
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